COLD
COLD data stores are meant for medium term data storage (months to a few years) and are configured for robustness rather than performance. The characteristics of COLD data stores are
- Optimized for high capacity
- Optimized for robustness rather than performance
- Has a quota
- Has snapshots
- Has NO backups
Info
Snapshots can be used to restore accidentally deleted or corrupted data for a certain time window. Unlike backups, they do not protect against the loss of the entire filesystem.
The COLD filesystems have medium performance. The COLD data stores for each kind of project are:
| Kind of Project | Name | Media | Capacity | Filesystem |
|---|---|---|---|---|
| NHR | Ceph HDD Cold | HDD with metadata on SSD | 21 PiB (shared) | CephFS |
Info
Legend for the tags in the Capacity column:
(shared): They share capacity with other data stores. For example, NHR COLD and SCC Project data stores are on the same storage system.
The paths for the data store directories and their symlinks in the Project Map for each project are:
| Project Data Store | Path | Project Map symlink |
|---|---|---|
| Ceph HDD Cold | /mnt/ceph-hdd/cold/PROJECT | dir.ceph-hdd |